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The Bard 8612-078 water leakage sensor is an OEM safety device used to detect unwanted moisture or standing water where Bard wall mount HVAC equipment is installed, helping protect controls, wiring, and the surrounding space by signaling an alarm or shut down condition when a leak is present. This part is commonly applied in Bard environmental control and wall mounted air conditioner applications where condensate management and early leak detection are critical, so replacing a failed or unreliable sensor can prevent nuisance trips and reduce the risk of water damage. Verify your unit model and control system compatibility before ordering, since Bard leakage detection can interface differently depending on the controller and alarm board configuration.